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M.D.S., V.C., K.T., M.L., and M.S. declare no competing interests.","order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}},{"value":"The Stanford University Institutional Review Board approved this study (protocol number 50602). All data were gathered in the course of routine clinical care and anonymized, and so no specific consent was indicated.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethical approval"}}]}}